<div class="userpwd pos">
	<input type="password" placeholder="请输入密码" id="show_pwd" class="pw" />
	<i class="hidden hid"></i>
</div>
<div class="userpwd_hidden pos" style="display: none;">
	<input type="text" placeholder="请输入密码" id="hid_pwd" class="pw" />
	<i class="show sho"></i>
</div>

<div class="userpwd_again pos">
	<input type="password" placeholder="请再次输入密码" class="ag" id="show_pwd_ag" />
	<i class="hidden hid_ag"></i>
</div>
<div class="userpwd_again_hidden pos" style="display: none;">
	<input type="text" placeholder="请再次输入密码" class="ag" id="hid_pwd_ag" />
	<i class="show show_ag"></i>
</div>